--- title: "DMEGC DM710G12T-B66HSW vs DMEGC DM715G12T-B66HSW - Solar Panel Comparison | ComparePV" description: "Compare DMEGC DM710G12T-B66HSW vs DMEGC DM715G12T-B66HSW side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/dmegc-hengdian-group-dm715g12t-b66hsw" updated: 2026-09-11 --- # DMEGC DM710G12T-B66HSW vs DMEGC DM715G12T-B66HSW Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [DMEGC DM710G12T-B66HSW](https://comparepv.com/panel/dmegc-hengdian-group-dm710g12t-b66hsw) | [DMEGC DM715G12T-B66HSW](https://comparepv.com/panel/dmegc-hengdian-group-dm715g12t-b66hsw) | | Manufacturer | DMEGC | DMEGC | | Power | 710 Wp | 715 Wp | | Efficiency | 22.90 % | 23.00 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | DM710G12T-B66HSW | DM715G12T-B66HSW | | --- | --- | --- | | Rated power | 710 Wp | 715 Wp | | Module efficiency | 22.90 % | 23.00 % | | Power density | 228.6 Wp/m² | 230.2 Wp/m² | | Open-circuit voltage | 48.82 V | 49.02 V | | Voltage at max power | 40.76 V | 40.93 V | | Short-circuit current | 18.52 A | 18.56 A | | Current at max power | 17.45 A | 17.50 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2384x1303x33 mm | 2384x1303x33 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 37.7 kg | 37.7 kg | | Weight per kWp | 53.1 kg/kWp | 52.7 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, DM710G12T-B66HSW:** 23,822 kWh - **Cumulative output, DM715G12T-B66HSW:** 23,990 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | DM710G12T-B66HSW | DM715G12T-B66HSW | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 710 W | 715 W | 100.0% of rated power | | Cool, bright day | 40 °C | 679 W | 684 W | 95.7% of rated power | | Typical summer roof | 55 °C | 648 W | 653 W | 91.3% of rated power | | Hot roof | 70 °C | 617 W | 622 W | 87.0% of rated power | ## Against the whole database | Measure | DM710G12T-B66HSW | DM715G12T-B66HSW | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,359 | #1,919 | 14,005 | DM715G12T-B66HSW leads by 440 places | | Power density | #2,474 | #2,018 | 14,005 | DM715G12T-B66HSW leads by 456 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #6,877 | #6,393 | 14,005 | DM715G12T-B66HSW leads by 484 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #576 | #450 | 14,005 | DM715G12T-B66HSW leads by 126 places | ## Questions ### Which panel is better: DMEGC DM710G12T-B66HSW or DMEGC DM715G12T-B66HSW? According to our database: **DMEGC DM715G12T-B66HSW** has higher module efficiency (**23.00%** vs **22.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of DMEGC DM710G12T-B66HSW and DMEGC DM715G12T-B66HSW? **DMEGC DM710G12T-B66HSW** has a module efficiency of **22.90%**, while **DMEGC DM715G12T-B66HSW** is **23.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does DMEGC DM710G12T-B66HSW use vs DMEGC DM715G12T-B66HSW? **DMEGC DM710G12T-B66HSW** uses **TOPCon** cells; **DMEGC DM715G12T-B66HSW** uses **TOPCon**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on DMEGC DM710G12T-B66HSW and DMEGC DM715G12T-B66HSW? **DMEGC DM710G12T-B66HSW** has a **30 years** power warranty; **DMEGC DM715G12T-B66HSW** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are DMEGC DM710G12T-B66HSW and DMEGC DM715G12T-B66HSW bifacial panels? Both **DMEGC DM710G12T-B66HSW** and **DMEGC DM715G12T-B66HSW** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [DMEGC DM710G12T-B66HSW vs DMEGC DM720G12T-B66HSW](https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/dmegc-hengdian-group-dm720g12t-b66hsw) - 3 differences, the largest is module efficiency - [DMEGC DM710G12T-B66HSW vs DMEGC DM705G12T-B66HSW](https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/dmegc-hengdian-group-dm705g12t-b66hsw) - One difference: module efficiency - [DMEGC DM710G12T-B66HSW vs DMEGC DM700G12T-B66HSW](https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/dmegc-hengdian-group-dm700g12t-b66hsw) - 3 differences, the largest is module efficiency - [DMEGC DM710G12T-B66HSW vs DMEGC DM695G12T-B66HSW](https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/dmegc-hengdian-group-dm695g12t-b66hsw) - 3 differences, the largest is module efficiency - [DMEGC DM710G12T-B66HSW vs DMEGC DM635G12RT-B66HSW](https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/hengdian-group-dmegc-magnetics-co-ltd-dm635g12rt-b66hsw) - 9 differences, the largest is rated power - [DMEGC DM710G12T-B66HSW vs DMEGC DM630G12RT-B66HSW](https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/hengdian-group-dmegc-magnetics-co-ltd-dm630g12rt-b66hsw) - 8 differences, the largest is rated power --- Source: https://comparepv.com/compare/dmegc-hengdian-group-dm710g12t-b66hsw/dmegc-hengdian-group-dm715g12t-b66hsw Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.